Thompson Balanced and CutOff Valve Patent Model. This model was submitted to the Patent Office with the application for the patents issued to Joseph W. Thompson, of Salem, Ohio, April 27, 2875, nos. 162714 and 162715.

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Size: 1825px × 1369px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: industry, work